Survival rates of the first and second offspring of Echthrodelphax fairchildii Perkins (Hymenoptera: Dryinidae) under self and conspecific superparasitism: The effects of body size of ovipositing females

IF 0.7 4区 农林科学 Q4 ENTOMOLOGY
Weri Herlin, Hideto Yoshimura, Yoshihiro Y. Yamada
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Abstract

The effects of ovipositing female body size on the survival of the first and second offspring under self and conspecific superparasitism have not been determined. Here, we report the importance of the body size of ovipositing females for three intervals (0, 1, and 24 h) between first and second ovipositions using a semi-solitary ectoparasitoid, Echthrodelphax fairchildii, and fourth-instar nymphs of its host, the planthopper Laodelphax striatellus. We addressed the case in which the first and second parasitoid eggs were laid on different sides of the same host. The second ovipositing female killed the previous offspring using the sting, but when the oviposition intervals were 0 and 1 h, the elimination was unprofitable because both offspring often emerged under non-probing superparasitism. The survival rate of the second offspring decreased with increasing oviposition intervals under non-probing superparasitism, whereas that of the first offspring was independent of oviposition intervals. Under non-probing superparasitism, the survival rates of the first and second offspring were higher under conspecific superparasitism than under self superparasitism, especially when the first and/or second ovipositing females were small. Large mothers ensured high survival rates of their offspring under non-probing superparasitism, except the survival rate of the second offspring under conspecific superparasitism, which was negatively associated with the first female's size. Thus, the first offspring from small mothers were likely to lose the competition to the second offspring. Under probing superparasitism, the second offspring survival rate was positively associated with the mother's size, suggesting that offspring, not ovipositing females, release agents affecting the mother-size effect.

在自身和同种超寄生条件下,费尔柴棘蝶(膜翅目:Dryinidae)第一代和第二代的存活率:产卵雌性体型的影响
在自身和同种超寄生条件下,产卵雌性体型对第一个和第二个后代存活的影响尚未确定。在这里,我们报告了产卵雌性在三个时间间隔(0、1和24)内体型的重要性 h) 在第一次和第二次产卵之间,使用半孤立的外寄生蜂——费尔柴棘蚧和其寄主的四龄若虫——条纹灰飞虱。我们讨论了第一个和第二个寄生蜂卵产在同一宿主不同侧面的情况。第二只产卵的雌性用刺杀死了之前的后代,但当产卵间隔为0和1时 h、 这种消除是无利可图的,因为两个后代都经常出现在非探测性的超寄生状态下。在非试探性超寄生条件下,第二代的存活率随着产卵间隔的增加而降低,而第一代的生存率与产卵间隔无关。在非试探性超寄生下,同种超寄生下第一和第二后代的存活率高于自身超寄生下的存活率,尤其是当第一和/或第二次产卵的雌性较小时。体型较大的母亲确保了其后代在非探测性超寄生下的高存活率,但第二个后代在同种超寄生条件下的存活率除外,这与第一只雌性的体型呈负相关。因此,来自小母亲的第一个后代很可能会在竞争中输给第二个后代。在探测性超寄生条件下,第二代后代的存活率与母亲的体型呈正相关,这表明后代而不是产卵的雌性,释放了影响母亲体型效应的因素。
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来源期刊
Entomological Science
Entomological Science 生物-昆虫学
CiteScore
2.00
自引率
11.10%
发文量
30
审稿时长
6-12 weeks
期刊介绍: Entomological Science is the official English language journal of the Entomological Society of Japan. The Journal publishes original research papers and reviews from any entomological discipline or from directly allied field in ecology, behavioral biology, physiology, biochemistry, development, genetics, systematics, morphology, evolution and general entomology. Papers of applied entomology will be considered for publication if they significantly advance in the field of entomological science in the opinion of the Editors and Editorial Board.
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